A computer network based digital information library system employing authentication and encryption protocols for the secure transfer of digital information library programs to a client computer system and a mobile digital information playback device removably connectable to the client computer system. The present invention is a computer network based library and information delivery system for accessing and obtaining selected digital information files. The library and information delivery system comprises: 1) a library server having a plurality of digital information files; 2) a client computer system coupled to the library server over a network; and 3) a mobile device removably connectable to the client computer system, the client computer system including logic for requesting a download of a selected one or more of the digital information files from the library server, the client computer system further including logic for downloading the selected one or more of the digital information files to the mobile device.

Digital information library and delivery system with logic for generating files targeting a playback device

A computer network based digital information library system employing authentication and encryption protocols for the secure transfer of digital information library programs to a client computer system (214) and a mobile digital information playback device (212) removably connectable to the client computer system. The present invention is a computer network based library and information delivery system for accessing and obtaining selected digital information files. The library and information delivery system comprises: 1) a library server (260) having a plurality of digital information files; 2) a client computer system (214) coupled to the library server (260) over a network (240); and 3) a mobile device (212) removably connectable to the client computer system (214), the client computer system (214) including logic for requesting a download of a selected one or more of the digital information files from the library server (260), the client computer system (214) further including logic for downloading the selected one or more of the digital information files to the mobile device (212).

A digital information library and delivery system

A method and apparatus for personalized time-shifted programming. Digital content is retrieved, for example, from a digital library (110). Once retrieved, the content is stored locally, for example, on a personal computer (120). The locally stored content is transferred, in whole or in part, to a playback device (125) that allows a user to listen to the content of the playback device. In one embodiment, the user may designate portions of a playback time provided by the playback device (125) to various selections. For example, with a playback device that provides two hours of content, a user may wish to listen to one half hour of news, one half hour of a series and one hour of an book. Thus, the user may partition one quarter of playback time to each of news and the series and one half of the playback time to the book. In one embodiment, the present invention provides different automatic update techniques for the playback device (125) that may be selected by the user based on how the content is to be used. For example, the news portion may be one half hour of the most recent news available from a particular source. The series may be the most recent episode in the series, whether or not the user has listened to other stored episodes. The book portion may provide one hour of the book from the most recent stopping place each time the playback device (125) is coupled to the library retrieval device (120).

Personalized time-shifted programming

A method and apparatus for digital content license management is disclosed that provides one or more license management devices that manage licenses for playback of digital content. The license management devices create licenses having an associated cardinality that determines the number of playback devices that can be authorized by the license. The license is stored in a set of playback devices, where the number of playback devices in the set corresponds to the cardinality of the license. The license is also included in digital content that the license authorizes for playback. Playback devices that have a license that matches a license included in the digital content are authorized to play the digital content. A single license can be used to provide authorization to play digital content from multiple sources and/or multiple types of content. Playback devices can store multiple licenses, which allows playback devices to belong to multiple sets of playback devices authorized to playback various digital content. In one embodiment digital content files can contain multiple licenses to allow the content files to be shared by multiple sets of playback devices.

License management for digital content

Apparatus and method for authoring and maintaining a library of content and targeting content to a playback device

A technique for storing, processing, and transmitting highly sensitive information over a computer network in the Industrial Technology Research Institute's application system is described. Both secrecy information and user passwords for accessing this information are encrypted by using the public key cryptosystem of the RSA (River-Shamir-Adleman) scheme and El Gamal public key cryptosystem. Based on the special characteristics of this system where the development system and product system are located in different computers, the concept of the digital signature is used to let authorized users execute authentication programs and extract information. >

C.-M. Tsai

Papers

An authenticate processing for the information system in Industrial Technology Research Institute